US3974867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log splitter
Assignee: Individual
•
Filing: 1975-04-30
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Granted: 1976-08-17
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Expires: 1995-04-30
Abstract
Abstract A log splitter for use in a high production environment utilizes a four-way, stepped knife blade at either end of a longitudinal stroke. A log is automatically placed and positioned between and at the center of the four-way knife blades by a hydraulically operated table. A self centering circular ram connected to a two-way hydraulic cylinder forces the log through either of the four-way knife blades depending upon which end of the stroke the ram was last positioned. The invention contemplates a conveyor input of logs and conveyor output of quartered logs.
Inventors
- 👤 Joseph T. Butas, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
B; B27; B27L; B27L7/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
105 words
A log splitter comprising a frame member having a boxlike construction with an elongated aperture in the top thereof, a pair of blade means one permanently positioned at each end of said frame member, adjustable table means positioned between said pair of blade means and supported on said frame member selectably supporting a log relative to the pair of blade means, ram means slidably mounted within said elongated aperture of said frame member, and hydraulic cylinder means attached to said ram means to drive said ram means against one said blade means under expansion conditions and against the other said blade means under contraction conditions.
Claim 2
Dependent Claim
105 words
A log splitter comprising a frame member having a boxlike construction with an elongated aperture in the top thereof, a pair of blade means one permanently positioned at each end of said frame member, adjustable table means positioned between said pair of blade means and supported on said frame member selectably supporting a log relative to the pair of blade means, ram means slidably mounted within said elongated aperture of said frame member, and hydraulic cylinder means attached to said ram means to drive said ram means against one said blade means under expansion conditions and against the other said blade means under contraction conditions.
Claim 3
Dependent Claim
39 words
The log splitter according to claim 1 wherein the frame member is slidably mounted on a second frame member and a second hydraulic cylinder means is arranged to move the frame member along a distance upon expansion and contraction.
Claim 4
Dependent Claim
28 words
The log splitter according to claim 1 wherein the pair of blade means further comprise horizontal and vertical components whereby a log is split into four individual sections.
Claim 5
Dependent Claim
30 words
The log splitter according to claim 3 wherein each of the horizontal and vertical components include a portion thereof removed from and ahead of the remainder of the respective component.
Claim 6
Dependent Claim
80 words
The log splitter according to claim 1 wherein the adjustable table means comprises a pair of wing means, one edge of each said pair of wing means being hingedly connected to said frame member adjacent to said elongated aperture and the other edge of each said pair of wing means having a hydraulic cylinder means permanently positioned between the wing means and the frame member whereby the pair of wing means may be selectively positioned relative to the frame member.
Claim 7
Dependent Claim
19 words
The log splitter according to claim 5 wherein the said adjustable table includes a self-loading log means integral therewith.
Claim 8
Dependent Claim
34 words
The log splitter according to claim 1 wherein the ram means includes a hollow cylindrical pusher for contacting the cross section of a log at a plurality of points to thereby be self balancing.
Claim 9
Dependent Claim
31 words
The log splitter according to claim 1 wherein said hydraulic cylinder means is attached to said ram means by a linkage means extending through the elongated aperture in said frame member.
Claim 10
Dependent Claim
217 words
A log splitter comprising a first frame member having a box-like construction, said first frame member having an elongated aperture therein, said first frame member slidably mounted on a second frame member, a first four-way blade means mounted at one end of said first frame member and said elongated aperture, a second four-way blade means mounted at another end of said first frame member and said elongated aperture most remote from said first four-way blade means and generally parallel to said first four-way blade means, adjustable table means positioned between said first and second four-way blade means, said adjustable table means having a pair of wing means hingedly connected to said first frame member one on each side of said elongated aperture, ram means slidably positioned within said elongated aperture and extending to the center of the first and second four-way blade means, first hydraulic cylinder means mounted on said first frame member for selectively positioning the pair of wing means, second hydraulic cylinder means mounted on said first frame member and connected to said ram means for moving said ram means along the elongated aperture between the first and second four-way blade means, and third hydraulic cylinder means mounted on said second frame member for moving said first frame member relative to said second frame member.
Claim 11
Dependent Claim
217 words
A log splitter comprising a first frame member having a box-like construction, said first frame member having an elongated aperture therein, said first frame member slidably mounted on a second frame member, a first four-way blade means mounted at one end of said first frame member and said elongated aperture, a second four-way blade means mounted at another end of said first frame member and said elongated aperture most remote from said first four-way blade means and generally parallel to said first four-way blade means, adjustable table means positioned between said first and second four-way blade means, said adjustable table means having a pair of wing means hingedly connected to said first frame member one on each side of said elongated aperture, ram means slidably positioned within said elongated aperture and extending to the center of the first and second four-way blade means, first hydraulic cylinder means mounted on said first frame member for selectively positioning the pair of wing means, second hydraulic cylinder means mounted on said first frame member and connected to said ram means for moving said ram means along the elongated aperture between the first and second four-way blade means, and third hydraulic cylinder means mounted on said second frame member for moving said first frame member relative to said second frame member.
Claim 12
Dependent Claim
36 words
The log splitter according to claim 9 wherein the adjustable table means includes a pair of finger means spring biased thereon for automatically picking up a log and depositing the same onto the adjustable table means.
Claim 13
Independent Claim
114 words
The method of splitting a log through the use of hydraulics comprising loading a log onto an adjustable table means on a frame member, positioning the log relative to the center of a pair of four-way blade means being arranged one at each end of the frame member, forcing a log through one of the pair of four-way blade means with a ram means by means of hydraulic cylinder means, stopping the ram means immediately adjacent to one of said pair of four-way blade means, and forcing another log through the other of said pair of four-way blade means with the ram means by means of a return stroke of the hydraulic cylinder means.
Claim 14
Independent Claim
114 words
The method of splitting a log through the use of hydraulics comprising loading a log onto an adjustable table means on a frame member, positioning the log relative to the center of a pair of four-way blade means being arranged one at each end of the frame member, forcing a log through one of the pair of four-way blade means with a ram means by means of hydraulic cylinder means, stopping the ram means immediately adjacent to one of said pair of four-way blade means, and forcing another log through the other of said pair of four-way blade means with the ram means by means of a return stroke of the hydraulic cylinder means.
Claim 15
Dependent Claim
204 words
A process for splitting logs including a log splitter, an input conveyor and an output conveyor comprising delivering logs to the log splitter by means of the input conveyor, automatically lifting a log from the input conveyor to the log splitter, positioning the log within the log splitter at the center of a pair of stationary four-way splitting blades one at each end of the log splitter, forcing the log through one of the pair of stationary four-way splitting blades by means of a hydraulic cylinder during the expansion stroke of the hydraulic cylinder, dropping the split log out one end of the log splitter from the one stationary four-way splitting blade onto the output conveyor to be carried away, lifting another log from the input conveyor to the log splitter, positioning the log within the log splitter at the center of the pair of stationary four-way splitting blades, forcing the log through the other of the pair of four-way splitting blades by means of the hydraulic cylinder during the return, contraction stroke of the hydraulic cylinder, and dropping the split log out the other end of the log splitter from the other stationary four-way blade onto the output conveyor to be carried away.
Claim 16
Dependent Claim
204 words
A process for splitting logs including a log splitter, an input conveyor and an output conveyor comprising delivering logs to the log splitter by means of the input conveyor, automatically lifting a log from the input conveyor to the log splitter, positioning the log within the log splitter at the center of a pair of stationary four-way splitting blades one at each end of the log splitter, forcing the log through one of the pair of stationary four-way splitting blades by means of a hydraulic cylinder during the expansion stroke of the hydraulic cylinder, dropping the split log out one end of the log splitter from the one stationary four-way splitting blade onto the output conveyor to be carried away, lifting another log from the input conveyor to the log splitter, positioning the log within the log splitter at the center of the pair of stationary four-way splitting blades, forcing the log through the other of the pair of four-way splitting blades by means of the hydraulic cylinder during the return, contraction stroke of the hydraulic cylinder, and dropping the split log out the other end of the log splitter from the other stationary four-way blade onto the output conveyor to be carried away.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |